Provide reference to BrightnessController in DisplayApp

For the simulator I need a way to get to the brightnessController object
and handle the set brightness-levels accoringly.

This is done by the constructor expecting a brightnessController object
instead of initializing one itself

src/displayapp/DisplayAppRecovery.h

@@ -34,6 +34,7 @@ namespace Pinetime {
     class MotorController;
     class TimerController;
     class AlarmController;
+    class BrightnessController;
   }
 
   namespace System {
@@ -57,6 +58,7 @@ namespace Pinetime {
                  Pinetime::Controllers::MotionController& motionController,
                  Pinetime::Controllers::TimerController& timerController,
                  Pinetime::Controllers::AlarmController& alarmController,
+                 Pinetime::Controllers::BrightnessController& brightnessController,
                  Pinetime::Controllers::TouchHandler& touchHandler);
       void Start();
       void Start(Pinetime::System::BootErrors){ Start(); };